Messac, Ille-et-Vilaine

{{Short description|Commune in Brittany, France}}

{{Expand French|date=March 2024|topic=geo}}{{Infobox French commune

|name = Messac

|native name = Mezeg

|image = Messac35 mairie.jpg

|caption = The town hall of Messac

|image coat of arms = Blason ville fr Messac (Ille-et-Vilaine).svg

|coordinates = {{coord|47.8256|-1.8072|format=dms|display=inline,title}}

|INSEE = 35176

|postal code = 35480

|arrondissement = Redon

|canton = Redon

|commune = Guipry-Messac

|elevation min m = 3

|elevation max m = 89

|area km2 = 41.64

|population = 3204

|population date = 2018

|population footnotes = [https://www.insee.fr/fr/statistiques/fichier/4989724/ensemble.pdf Téléchargement du fichier d'ensemble des populations légales en 2018], INSEE

}}

Messac ({{IPA|fr|mesak}}; {{langx|br|Mezeg}}; Gallo: Meczac) is a former commune in the Ille-et-Vilaine department of Brittany in northwestern France. On 1 January 2016, it was merged into the new commune Guipry-Messac.[http://raa.bretagne.sit.gouv.fr/sit_1_ALK/upload/raa_35_ALK/acte/18192/update_word18192.pdf Arrêté préfectoral] 23 July 2015 {{in lang|fr}}